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WWDC20 · 23 min · Swift / SwiftUI & UI Frameworks / App Services

Meet WidgetKit

Meet WidgetKit: the best way to bring your app’s most useful information directly to the home screen. We’ll show you what makes a great widget and take a look at WidgetKit’s features and functionality. Learn how to get started creating a widget, and find out how WidgetKit leverages the power of SwiftUI to provide a stateless experience. Discover how to harness your existing proactive technologies to make sure your widget surfaces relevant material. And create a Timeline that ensures your content is always fresh. For more on creating widgets, check out "Build SwiftUI views for widgets" and "The widgets code-along."

Watch at developer.apple.com ↗

Transcript all transcripts

Code shown on screen · 4 snippets

StaticConfiguration Widget definition swift · at 11:01 ↗ 
@main
public struct SampleWidget: Widget {
    private let kind: String = "SampleWidget"

    public var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind,
                            provider: Provider(),
                            placeholder: PlaceholderView()) { entry in
                                SampleWidgetEntryView(entry: entry)
                            }
        .configurationDisplayName("My Widget")
        .description("This is an example widget.")
    }
}
TimelineProvider example swift · at 15:51 ↗ 
public struct Provider: TimelineProvider {

    public func snapshot(with context: Context, 
                         completion: @escaping (SimpleEntry) -> ()) {
        let entry = SimpleEntry(date: Date())
        completion(entry)
    }

    public func timeline(with context: Context, 
                         completion: @escaping (Timeline<Entry>) -> ()) {
        let entry = SimpleEntry(date: Date())
        let timeline = Timeline(entries: [entry, entry], policy: .atEnd)
        completion(timeline)
    }
}
IntentConfiguration Widget definition swift · at 20:45 ↗ 
@main
public struct SampleWidget: Widget {
    private let kind: String = "SampleWidget"

    public var body: some WidgetConfiguration {
        IntentConfiguration(kind: kind,
                    intent: ConfigurationIntent.self
                            provider: Provider(),
                            placeholder: PlaceholderView()) { entry in
                                SampleWidgetEntryView(entry: entry)
                            }
        .configurationDisplayName("My Widget")
        .description("This is an example widget.")
    }
}
IntentTimelineProvider example swift · at 20:54 ↗ 
public struct Provider: IntentTimelineProvider {

    public func timeline(for configuration: ConfigurationIntent, with context: Context, 
                         completion: @escaping (Timeline<Entry>) -> ()) {
        let entry = SimpleEntry(date: Date(), configuration: configuration)

        // generate a timeline based on the values of the Intent

       completion(timeline)
    }
}

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